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Abstract Detail

Reproductive biology

Cohen, Jim [1].

Breeding system variation in Oreocarya crassipes.

Oreocarya crassipes (Boraginaceae) is an endangered species endemic to Brewster Co., Texas in the area just north of Big Bend National Park. Plants are known from upwards of a dozen populations, all of which are on private land. The ecology and edaphic specialization of the plant have been investigated, but other aspects of the biology of O. crassipes remain unknown. Indeed, one of the primary aspects of the biology of the species, its breeding system, is understudied. O. crassipes is heterostylous, but the morphological variation within and between the long-style and short-style floral morphs has not been quantified. In 2014, mature flowers from individuals from four populations of O. crassipes were collected, and stigma height, anther height, anther-stigma height separation, corolla length, corolla tube length, corolla width, and corolla tube width were measured. These results were compared within and between morphs and among populations. Between the morphs, stigma height and anther height are significantly different. This was also the case for anther-stigma separation, with the long-style morph having greater separation than the short-style morph. Corolla tube width was also significantly different, with the short-style morph having a wider corolla tube compared to the long-style morph. These differences help to better understand the morphological variation and breeding system of this rare species.

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1 - 1010 Blanchard Ave., Flint, MI, 48503, USA

breeding system

Presentation Type: Poster
Session: P, Reproductive Biology Posters
Location: Exhibit Hall/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 5:30 PM This poster will be presented at 6:15 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PRP004
Abstract ID:512
Candidate for Awards:None

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